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Risk Assessment of Radiation-Induced Stomach Cancer in Population of Belarus

Risk Assessment of Radiation-Induced Stomach Cancer in Population of Belarus. M.V.Malko Institute of Power National Academy of Sciences of Belarus, Minsk, Belarus.

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Risk Assessment of Radiation-Induced Stomach Cancer in Population of Belarus

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  1. Risk Assessment of Radiation-Induced Stomach Cancer in Population of Belarus M.V.Malko Institute of Power National Academy of Sciences of Belarus, Minsk, Belarus

  2. The incidence in stomach cancers in the Belarusian population are presented in the report. It is found that approximately 2,740 additional stomach cancers appeared in Belarus in 1990-2007 (95% CI from 2,020 to 3,470 cases). The number of stomach cancers registered in Belarus in this period is about 67,076 cases (64,335 expected cases). According to performed assessment the relative risk of additional or radiation-induced stomach cancers averaged for the period 1986-2001 is equal to 1.03 (95% CI from 1.04 to 1.05). The excessive absolute risk of stomach cancers, EAR, averaged for the same period is assessed as 67 cases per 104 PYSv (95% CI from 49 cases to 85 cases per 104 PYSv). The averaged excessive relative risk, ERR, is estimated equal to 1.9% per 1 mSv (95% CI from 1.4 to 2.4 % per 1 mSv) and the averaged attributive risk, AR, is estimated equal to 4.1% (95% CI from 3.0 to 5.1%).

  3. Contaminated areas in Belarus with the level of caesium-137 equal to 37 kBq/m2 (1 Ci/km2) or higher (in square kilometers)

  4. Deposition of the isotope 137Cs in separate provinces of Belarus as a result of the Chernobyl accident (Assessment of M.Malko)

  5. By calculation of doses of the whole body irradiation all radionuclides that gave some measurable contribution to the summary exposition in 1986 were considered. They are 131I, 132Te, 103Ru, 106Ru, 140Ba, 134Cs and 137Cs. The short-lived isotopes 131I, 132Te, 103Ru, 106Ru, 140Ba and 134Cs determined approximately 85% of the summary exposition dose in the period from 26 April 1986 to 31 August 1986. The isotope 137Cs was taken after the accident at the Chernobyl NPP as an indicator of the radioactive contamination. Therefore, only this isotope is mentioned here and below by characterizing of radioactive contamination despite the fact that contribution of other isotopes to irradiation doses is also considered.

  6. Irradiation doses of inhabitants of rural settlements situated in contaminated areas of Belarus in mSv (Assessment of M.Malko)

  7. Assessment (M.Malko)of irradiation doses of inhabitants of rural settlement Vysoki Barok (Krasnapolye district, Mogilev region) and Chudziany (Cherikau district, Mogilev region)

  8. Comparison of average irradiation doses of inhabitants of the Belarusian, Russian and the Ukrainian rural settlements situated in areas with contamination levels in 137Cs ranges from 555 to 1,480 kBq/m2 (15 – 40 Ci/km2)

  9. Numbers of the Belarusian evacuees, liquidators and resettled persons as well as their equivalent irradiation doses

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